The Shake It Off hitmaker thought better of correcting a man who mistakenly called her BFF Lorde her manager - and decided to play along instead.

Appearing on The Tonight Show with Jimmy Fallon, Royals singer Lorde described the time Taylor made her part of her management team.

She said: "We were at this Grammy party. This was before the Grammys and I was like - there are all these people everywhere, there's like this person and it's insane. And I sort of found her [Taylor] and clung to her.

Lorde and Taylor at the 2014 American Music Awards (Image: Getty)

"A lot of people come up to Taylor, you know, just to talk about stuff and she's lovely, she's great.

The 18-year-old continued: "And there was this guy and he wanted her to play some event he was having. And he chatted for 10 minutes and she was obviously lovely about it, and it got to the end of the conversation and he said 'so I'll leave my card is this your manager?'

"No beat passed and she was like 'yep'. And all of a sudden I was Taylor Swift's manager."

Amazing.

Gal-pals (Image: Splash)

Leggie Taylor thought it was pretty funny too, sharing with her fans a video of the interview and saying: "Any questions or requests can be directed to my manager, @lorde music. LOLz"